area.lineX1() Returns a new line generator that has this area generator’s current defined accessor, curve and context. The line’s x-accessor is this area’s x1-accessor, and the line’s y-accessor is this area’s y0-accessor.

rectangularPolyconic.parallel([parallel]) Defaults to 0°.

band.copy() Returns an exact copy of this scale. Changes to this scale will not affect the returned scale, and vice versa.

treemap.padding([padding]) If padding is specified, sets the inner and outer padding to the specified number or function and returns this treemap layout. If padding is not specified, returns the current inner padding function.

time.rangeRound([range]) See continuous.rangeRound.

d3.thresholdFreedmanDiaconis(values, min, max) Returns the number of bins according to the Freedman–Diaconis rule; the input values must be numbers.

lagrange.spacing([spacing]) Defaults to 0.5.

d3.geoPolyhedralCollignon() The Collignon butterfly projection.

d3.geoRectangularPolyconic() d3.geoRectangularPolyconicRaw(phi0) The rectangular (War Office) polyconic projection.

d3.forceCenter([x, y]) Creates a new centering force with the specified x- and y- coordinates. If x and y are not specified, they default to ⟨0,0⟩.